Maria Hameed

Attivo dal 2018

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Domanda

How can I keep values of an array random.
I have an array T=(0 1 2 7 71 158 187). i wanna generate A=(158 71 2 187 0 152 1) please tell me a command for generating A. ...

circa 7 anni fa | 2 risposte | 0

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Domanda

Is there any code or command to generate Q(S(n))=n-1 Thanks.
I have two matrices S and Q of size 1*12. the range for elements of S and Q is (1:256) S= [83 27 146 179 173 18 50 85 255 216 ...

circa 7 anni fa | 2 risposte | 0

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Domanda

How can i permute RGB image pixels ?
i wanna permute image pixels please help me thanks.

circa 7 anni fa | 1 risposta | 0

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Domanda

kindly guide me that can I use P-Boxes to diffuse image pixels ?
I used S-boxes to confuse pixels of image but for further security the requirement is to diffuse the pixels too so, I wanna get ...

circa 7 anni fa | 0 risposte | 0

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Domanda

Is there any command to change one pixel of an RGB image ?
I can acess the pixel value of an RGB image at 100th row and 100th column as 137(red pixel) 76(green pixel) and 120(blue pixel)...

circa 7 anni fa | 1 risposta | 0

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Domanda

Hi i wanna find out entropy of a colour image please help me to find .
Entropy_Red_Channel=Entropy(input_image(:,:,1)). I use the command written above to find entropy of seperate colour components...

circa 7 anni fa | 1 risposta | 0

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Domanda

Is there any code or command to find entropy for colour images.
If I have 3 colour images and i want to find entropy for these images then please anyone help me to find. Thanks

circa 7 anni fa | 1 risposta | 0

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Domanda

How can i find Inverse of an array of non negative integers ?
e.g If I have G= (4 1 2 5 3 ) I want the output as S= (2 3 5 1 4 )

circa 7 anni fa | 1 risposta | 0

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Domanda

If i have array defined as G=(83 27 125 99 0 25 255 ..... ) .Is there any command or code to find S as defined below ?
i have an array i.e G= (83 27 125 99 0 25 255 ....) the thing i know is that G(1)=83 G(2)=27 ..... i wana create a S=(....) such...

circa 7 anni fa | 3 risposte | 0

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Domanda

How to find an inverse S-box ?
I have an S-box i.e T=([12 20 28 36 46 56 69 83 99 117 139 163 191 222 3 43 87 136 190 250 61 133 211 41 232 85 199 68 200 86...

oltre 7 anni fa | 0 risposte | 0

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Domanda

Is there any code or command for doubling a point ?
I have an elliptic curve y*2=x*3+148x+225 mod 5003 I took G=(1355,2421) as the shared key I want to find points as (G,2G,3G,4...

oltre 7 anni fa | 5 risposte | 0

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Domanda

Is there any code or command to multiply an elliptic curve point by a sequence of scalars ? (note that this multiplication is elliptic curve point multiplication)
If I have an elliptic curve point as G=(x,y) I want to generate 62*G,63*G,64*G,.....,318*G Note that it is elliptic curve poin...

oltre 7 anni fa | 0 risposte | 0

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Domanda

Is there any code or command to seperately display all the points of right_side = mod(a.^3+148*a+225,5003); as defined in code given below?
I have a code for generating some elliptic curve points as disp('y^2 = x^3 + 148x + 225 mod 5003') a=0:5002 left_side...

oltre 7 anni fa | 1 risposta | 0

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Domanda

I have some elliptic curve points as (x y) . How can i extract just y values of all the points ?
e.g if i have disp('y^2 = x^3 + 537x + 2438 mod 123457') a=0:123456 left_side = mod(a.^2,123457); right_side = mo...

oltre 7 anni fa | 1 risposta | 0

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Domanda

How to apply elliptic curve point multiplication using matlab code or command ?
e.g I have elliptic curve points as [(0, 6) (6,14) (12, 3) (15, 4) (21,7) (0,25) (6,17) (12,28) (15,27) (21,24) (1,10) ( 7,13)...

oltre 7 anni fa | 2 risposte | 0

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Domanda

May i get a command or code for extracting random and nonrepeating numbers from an array of numbers ? like from the data given below
e.g T=([1 25 14 2 78 25 13 5 2 ]) i want the correct answer as T=([1 25 14 2 78 13 5])

oltre 7 anni fa | 1 risposta | 0

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